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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_icl.concepts.aspects"></a><a class="link" href="aspects.html" title="Aspects">Aspects</a>
</h3></div></div></div>
<p>
        There are two major <span class="emphasis"><em><span class="bold"><strong>aspects</strong></span></em></span>
        or <span class="emphasis"><em><span class="bold"><strong>views</strong></span></em></span> of icl containers.
        The first and predominant aspect is called <span class="emphasis"><em><span class="bold"><strong>fundamental</strong></span></em></span>.
        The second and minor aspect is called <span class="emphasis"><em><span class="bold"><strong>segmental</strong></span></em></span>.
      </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
              </th>
<th>
                <p>
                  Fundamental
                </p>
              </th>
<th>
                <p>
                  Segmental
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  Abstraction level
                </p>
              </td>
<td>
                <p>
                  more abstract
                </p>
              </td>
<td>
                <p>
                  less abstract
                </p>
              </td>
</tr>
<tr>
<td>
              </td>
<td>
                <p>
                  sequence of elements is irrelevant
                </p>
              </td>
<td>
                <p>
                  sequence of elements is relevant
                </p>
              </td>
</tr>
<tr>
<td>
              </td>
<td>
                <p>
                  iterator independent
                </p>
              </td>
<td>
                <p>
                  iterator dependent
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  Informs about
                </p>
              </td>
<td>
                <p>
                  membership of elements
                </p>
              </td>
<td>
                <p>
                  sequence of intervals (segmentation)
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  Equality
                </p>
              </td>
<td>
                <p>
                  equality of elements
                </p>
              </td>
<td>
                <p>
                  equality of segments
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  Practical
                </p>
              </td>
<td>
                <p>
                  interval_sets(maps) can be used as sets(maps) of elements(element
                  value pairs)
                </p>
              </td>
<td>
                <p>
                  Segmentation information is available. See e.g. <a class="link" href="../examples/time_grids.html" title="Time grids for months and weeks">Time
                  grids for months and weeks</a>
                </p>
              </td>
</tr>
</tbody>
</table></div>
<p>
        On the fundamental aspect
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            an <code class="computeroutput"><span class="identifier">interval</span></code> implements
            a set of elements partially.
          </li>
<li class="listitem">
            an <code class="computeroutput"><a class="link" href="../../boost/icl/interval_set.html" title="Class template interval_set">interval_set</a></code>
            implements a set of elements.
          </li>
<li class="listitem">
            an <code class="computeroutput"><a class="link" href="../../boost/icl/interval_map.html" title="Class template interval_map">interval_map</a></code>
            implements a map of element value pairs.
          </li>
</ul></div>
<p>
        On the segmental aspect
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            an <code class="computeroutput"><a class="link" href="../../boost/icl/interval_set.html" title="Class template interval_set">interval_set</a></code>
            implements a set of intervals.
          </li>
<li class="listitem">
            an <code class="computeroutput"><a class="link" href="../../boost/icl/interval_map.html" title="Class template interval_map">interval_map</a></code>
            implements a map of interval value pairs.
          </li>
</ul></div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2007-2010 Joachim
      Faulhaber<br>Copyright © 1999-2006 Cortex Software
      GmbH<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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